Deterministic and Probability Analysis of Paper Machine Vibration Impact to the Structure Safety and Human Comfort

This paper describes the probability and sensitivity analysis of the concrete frame and paper machine interaction. On the base of the experimental results, the calculation FEM model was verified. The uncertainties of the loads level, the material properties and other influences following the inaccuracy of the calculated model and numerical methods were considered in the approximation method RSM

Analysis of Soil-Structure Interaction Effects of NPP Structures on Nonhomogeneous Subsoil

This paper describes the soil-structure interaction (SSI) effects to the Nuclear Power Plant (NPP) structure with reactor VVER-1200. The simplified 1D and numerical 3D FE models of the nonhomogeneous subsoil are investigated. The methodology of the calculation of the frequency dependent complex functions of the soil stiffness and damping is presented

Deterministic and probabilistic analysis of npp communication bridge resistance due to extreme loads

This paper presents the experiences from the deterministic and probability analysis of the reliability of communication bridge structure resistance due to extreme loads - wind and earthquake. On the example of the steel bridge between two NPP buildings is considered the efficiency of the bracing systems. The advantages and disadvantages of the deterministic and probabilistic analysis of the structure resistance are discussed. The advantages of the utilization the LHS method to analyze the safety and reliability of the structures is presented

Dynamic analysis of soil-structure interaction effects on NPP building using simplified and solid FE model of layered subsoil

This paper describes the soil-structure interaction (SSI) effects to the Nuclear Power Plant (NPP) structure with reactor VVER-1200/491 PWR. The simplified 1D and numerical 3D FE models of the layered subsoil are investigated. The methodology of the calculation of the frequency dependent complex functions of the soil stiffness and damping is presented

Seismic Analysis of the Soil-Structure Interaction Considering the Local Site Effects

The paper presents the results of analysis of the soil-structure interaction effects considering the local site effects. The influences of the local site effects – masses, stiffness and thickness of the layered subsoil - can significantly modify the stresses and deflections of the structural system. Two important characteristics that distinguish the dynamic soil-structure interaction system from other general dynamic structural systems are the unbounded nature and the plastic strains of the soil medium. Generally, the influence of the layered subsoil will be considered to define of the seismic loads and the stiffness and damping of the complex system soil-basestructure behaviour.Ostrav

Probability and sensitivity analysis of machine foundation and soil interaction

This paper deals with the possibility of the sensitivity and probabilistic analysis of the reliability of the machine foundation depending on variability of the soil stiffness, structure geometry and compressor operation. The requirements to design of the foundation under rotating machines increased due to development of calculation method and computer tools. During the structural design process, an engineer has to consider problems of the soil-foundation and foundation-machine interaction from the safety, reliability and durability of structure point of view. The advantages and disadvantages of the deterministic and probabilistic analysis of the machine foundation resistance are discussed. The sensitivity of the machine foundation to the uncertainties of the soil properties due to longtime rotating movement of machine is not negligible for design engineers. On the example of compressor foundation and turbine fy. SIEMENS AG the affectivity of the probabilistic design methodology was presented. The Latin Hypercube Sampling (LHS) simulation method for the analysis of the compressor foundation reliability was used on program ANSYS. The 200 simulations for five load cases were calculated in the real time on PC. The probabilistic analysis gives us more complex information about the soil-foundation-machine interaction as the deterministic analysis

Nonlinear Analysis of the Extreme Wind Fragility of the Reactor Hall Frame

This paper describe the methodology and the results of the safety analysis of the Nuclear Power Plant structures under impact of the extreme climatic loads. In the case of the Nuclear Power Plant structures, the design criteria are stronger. The requirements of the international agency IAEA and NRC standards are based on the probability of mean return period equal to one per 104 years. The fragility curve of the extreme wind was determined on the base of the nonlinear probability analysis of the steel hale frame considering material and geometric nonlinearity using ANSYS software. The failure mode of the NPP structures is expressed by High Confidence of Load Probability of Failure (HCLPF)